Perhaps you should try some spelling variations:
"supply european immigration policies." » "supply european migration policies.", "supply european integration policies.", "supply european federation policies.", "supply european immigration policy.", "supply european migration policy.", "supply europe immigration policies.", "survey european immigration policies."
"supply china integrating services." » "supply china integration services.", "supply china integrated services.", "supply china regulating services.", "supply chennai integrating services.", "supply change integrating services.", "supply chains integrating services.", "supply chain integrating services."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply european immigration policies.\") OR (\"supply china integrating services.\"))~".
• Removing quotes may allow a broader search: (( supply european immigration policies. ) OR ( supply china integrating services. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply european immigration policies.") OR ("supply china integrating services."))*.